Inserting rows into a temporary variable causes plan cache pollution in SQL Server

Question

In my database I use stored procedures to insert multiple rows from a temporary table variable. Inserting data into the temporary table variable causes a new adhoc plan to be created prior to each stored procedure execution which causes plan cache pollution. Is there any way to stop saving these adhoc plans and eliminate the pollution in the plan cache?

USE [tempdb];
GO

DROP PROCEDURE [dbo].[uspMyTableInsert];
GO

DROP TABLE [dbo].[MyTable];
GO

DROP TYPE [dbo].MyTable;
GO

CREATE TABLE [MyTable]
    (
     [ID] INT NOT NULL
              IDENTITY(1, 1)
              CONSTRAINT [PK_MyTable_ID] PRIMARY KEY CLUSTERED,
     [FirstName] VARCHAR(50) NOT NULL
    );
GO

CREATE TYPE [MyTable] AS TABLE
(
[FirstName] VARCHAR(50) NOT NULL
);
GO

CREATE PROCEDURE [dbo].[uspMyTableInsert]
    (
     @Table MyTable READONLY
    )
AS
BEGIN
    INSERT  INTO [dbo].[MyTable]
            ([FirstName])
    SELECT
        [t].[FirstName]
    FROM
        @Table AS [t];
END;
GO


DBCC FREEPROCCACHE;
GO


DECLARE @Table MyTable

INSERT  INTO @Table
        ([FirstName])
VALUES
        ('Bugs Bunny #1'),
        ('Daffy Duck #1');

EXEC [dbo].[uspMyTableInsert] @Table = @Table;
GO